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Running rough

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Corvette >> Corvette Models >> Corvette C4 Forum >> Running rough

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Running rough - 10/4/2007 1:27:46 PM

Drogo99

Posts: 2
Joined: 10/4/2007
Status: offline

1993 Ruby LT1 70K miles. Car is running real rough at highway speed 1500 rpm or so. Almost feels like it is strving for fuel. No codes coming back. I had it in the shop earlier this week and it had a code for EGR coming back and they replaced the valve and at my requirest changed all the plugs. The problem just seems real intermittent when it started doing it this afternoon the SES light did come on but is now off and still no codes....Ideas? Fuel filter? Pump? Clogged injectors?

Thanks!

Post #: 1

RE: Running rough - 10/4/2007 1:47:05 PM

rshiver

Posts: 381
Joined: 8/4/2007
Status: offline

Hi, welcome to CF...Check out this thread, may shed some light on what your problem might be.

http://www.corvetteforums.com/m_43770/tm.htm

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2000 Limited Edition Ford F-350 Lariat 4x4 Dually, 7.3 Liter Powerstroke Diesel
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1978 Chevy Camaro LT

(in reply to Drogo99)

Post #: 2

RE: Running rough - 10/4/2007 2:13:31 PM

cwb

Posts: 1508
Joined: 5/13/2007
From: eastern NC
Status: offline

quote:

ORIGINAL: Drogo99

1993 Ruby LT1 70K miles. Car is running real rough at highway speed 1500 rpm or so. Almost feels like it is strving for fuel. No codes coming back. I had it in the shop earlier this week and it had a code for EGR coming back and they replaced the valve and at my requirest changed all the plugs. The problem just seems real intermittent when it started doing it this afternoon the SES light did come on but is now off and still no codes....Ideas? Fuel filter? Pump? Clogged injectors?

Thanks!

Welcome drog...

EGR??? On an LT1??? I thought LT1 didn't even have an EGR...

EDIT: my mistake - only LT4 has no egr feed.

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Don''t know nuthin''; ain''t never got paid for wrenchin''...
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Post #: 3

RE: Running rough - 10/4/2007 2:17:50 PM

cwb

Posts: 1508
Joined: 5/13/2007
From: eastern NC
Status: offline

Does 15c revs in the driveway do the same thing?

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Post #: 4

RE: Running rough - 10/4/2007 6:54:50 PM

mech259

Posts: 1759
Joined: 1/22/2006
From: Lumberton, Texas
Status: offline

Check fuel pressure. Another might be ignition, such as Optispark, wires.

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Post #: 5

RE: Running rough - 10/4/2007 7:08:32 PM

Drogo99

Posts: 2
Joined: 10/4/2007
Status: offline

Thanks for all the tips.....that being said this is my first newer toy car, have lots of older chevy's and checking fuel pressure is not a problem, but how fo I do it on this motor....??? Thanks in advance.

(in reply to Drogo99)

Post #: 6

RE: Running rough - 10/5/2007 6:15:08 AM

LeesVette